Service members around the globe will be able to watch events from the Bellator mixed martial arts promotion on American Forces Network in June, beginning with a “heavyweight superfight” that may interest longtime MMA fans … even if it’s a few years past its use-by date. Bellator announced the deal on Memorial Day, offering few details on time slots or AFN channels but promising that the network will carry Bellator 138, a June 19 card in St. Louis that will feature Ken Shamrock vs. Kimbo Slice in a heavyweight main event. Shamrock, 51, fought on the first Ultimate Fighting Championships card…